The electronic scales most handloaders use (ie, <$500) all use the same basic strain gauge load cell technology. Strain gauges are often sarcastically referred to as "noise meters", ie, they will react to electronic noise.
This noise can come over the power cord or over the air. Sources include fluorescent lamps, the ballasts that drive them, cell phones, microwaves, motors, WiFi, and more.
Symptoms include the scale frequently losing zero or fluttering absent the presence of any motion, wind, or static electricity. The scale can easily become inaccurate depending on when it is actually affected by the noise.
Not all scales will react to all fluorescent fixtures . . . it depends on the level of the noise and the tolerance of the scale. Some folks are successful with some scales in their reloading rooms, more likely because their room is relatively noise free than that the scale has excellent protection from noise. This and the multitude of sources for noise leads to conflicting reviews about scales as well as methods for "eliminating" noise (eg ferrite cores added to the power cord).